Portable cooler



FIG. 1 is a front elevational view of the portable cooler showing my new design, shown with the lid open;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view of the portable cooler showing my new design, shown with the lid closed;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a top plan view thereof; and,

FIG. 12 is a bottom plan view thereof. 

I claim the ornamental design for a portable cooler, as shown and described. 